ash: Add SessionController/Client mojo interfaces

ash/public/interfaces/session_controller.typemap

Index: ash/public/interfaces/session_controller.typemap
diff --git a/ash/public/interfaces/session_controller.typemap b/ash/public/interfaces/session_controller.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..c0179ce69fae896901b7f9c0b32bae07ae80fd24
--- /dev/null
+++ b/ash/public/interfaces/session_controller.typemap
@@ -0,0 +1,21 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+mojom = "//ash/public/interfaces/session_controller.mojom"
+public_headers = [
+  "//ash/public/cpp/session_types.h",
+  "//components/session_manager/session_manager_types.h",
+  "//components/user_manager/user_type.h",
+]
+traits_headers = [ "//ash/public/interfaces/session_controller_traits.h" ]
+public_deps = [
+  "//ash/public/cpp",
+  "//components/session_manager:base",
+  "//components/user_manager",
+]
+type_mappings = [
+  "ash.mojom.AddUserSessionPolicy=ash::AddUserSessionPolicy",
+  "ash.mojom.SessionState=session_manager::SessionState",
+  "ash.mojom.UserType=user_manager::UserType",
+]